31. Smithsonite occurs as a secondary mineral in the weathering or oxidation zone of zinc-bearing ore deposits. 32. Delafossite is usually a secondary mineral that crystallizes near oxidized copper and is rarely a primary mineral. 33. Erythrite occurs as a secondary mineral in the oxide zone of Co Ni As bearing mineral deposits. 34. It occurs as a secondary mineral in mineral gossans, coal deposits, phosphate rich pegmatites and cave guano deposits. 35. There are also conical-shaped stalactites, secondary mineral deposits of silica and earthen deposits covering the walls and ceiling. 36. Devilline is a rare and unusual secondary mineral found in the oxidized portions of copper sulfide ore deposits. 37. Copiapite is strictly a secondary mineral forming from the weathering or oxidation of iron sulfide minerals or sulfide-rich coal. 38. It occurs as a secondary mineral in the oxidized weathering zone of hydrothermal uranium ore deposits which contain arsenic. 39. At the Tanza location it occurs as a secondary mineral formed by the oxidation of native bismuth or bismuthinite. 40. It is a rare secondary mineral found in complex granite pegmatites where it forms by weathering of earlier phosphate minerals.
